MindMap Gallery Sinusoidal alternating current - three components resistance, inductance and capacitance
The relationship between voltage and current in resistors, inductors, and capacitors mainly includes three parts: resistors, inductors, and capacitors. Friends who like it can give it a like!
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sinusoidal alternating current
three components
resistance
Circuit diagram
The basic relationship u=iR,
Impedance: R
phasor diagram
Instantaneous power
Active power:
Reactive power: 0
Inductive components
Circuit diagram:
Series and parallel connection: L has the same rules as resistance
Basic relationship:
Resistance:
Let the sinusoidal current of the circuit be
Instantaneous value:
Phasor formula (j here is the rotation factor):
maximum value
Valid valueU=wLI
phasor diagram
Resistance characteristics
Pass DC, block AC
Pass low frequencies, block high frequencies
Active power (average power): 0
Reactive power: The maximum value of the instantaneous power of the inductor is The "reactive power" received, the unit is "var" (Var)
Instantaneous power:
Capacitive element
At any time, the electric field energy stored in the capacitor is
basic relationship
Capacitive reactance: (unit ohm)
Instantaneous value:
Phasor formula:
Maximum value:
Valid valueI=wCU
Complex resistance:
Instantaneous power:
Active power (average power): 0
Reactive power:
Positive and negative are just the difference between capacitive reactive power and perceptual reactive power.